decnet: Don't leak entries when rebuilding zone.

As noticed by Ben Hutchings, when we move entries from
one table to another we leak all except the first entry.

Put back the "next" variable removed by commit
9bf9055eb716f85372c41b3fbc51f90bc7653740 ("decnet: Fix set-but-unused
variable.") and use it properly.

Reported-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index d8ea583076cf..bd0a52dd1d40 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -123,11 +123,12 @@ static inline void dn_rebuild_zone(struct dn_zone *dz,
                                    struct dn_fib_node **old_ht,
                                    int old_divisor)
 {
+        struct dn_fib_node *f, **fp, *next;
         int i;
-        struct dn_fib_node *f, **fp;
 
         for(i = 0; i < old_divisor; i++) {
-                for(f = old_ht[i]; f; f = f->fn_next) {
+                for(f = old_ht[i]; f; f = next) {
+                        next = f->fn_next;
                         for(fp = dn_chain_p(f->fn_key, dz);
                                 *fp && dn_key_leq((*fp)->fn_key, f->fn_key);
                                 fp = &(*fp)->fn_next)